Increase in the corrosion resistance of stainless steel bipolar plates by the formation of thermally-induced Cr-nitride
- Authors
- Lee, Seok Hee; Woo, Sung Pil; Lee, You Na; Yoon, Young Soo
- Issue Date
- Jun-2016
- Publisher
- INDERSCIENCE ENTERPRISES LTD
- Keywords
- corrosion resistance; thermal nitridation; polymer electrolyte membrane fuel cell; PEMFC; bipolar plates; stainless steel
- Citation
- INTERNATIONAL JOURNAL OF NANOTECHNOLOGY, v.13, no.4-6, pp.330 - 344
- Journal Title
- INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
- Volume
- 13
- Number
- 4-6
- Start Page
- 330
- End Page
- 344
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/9732
- DOI
- 10.1504/IJNT.2016.077083
- ISSN
- 1475-7435
- Abstract
- Cr-nitride layer is formed on the surface of Cr-electroplated stainless steel to use metallic bipolar plates of polymer electrolyte membrane fuel cell (PEMFC). The dense and continuous Cr-nitride layer is confirmed by scanning electron microscope (SEM) results. The corrosion resistance results in aggressive environments of PEMFC reveal that the corrosion current density of 0.5 mu A cm(-2) and 0.5 mu A cm(-2) are presented in anodic and cathodic environments of PEMFC, respectively. The highest protective efficiency of 99.9% is recorded in the cathodic condition. The dense Cr-nitride layer provides sufficient corrosion resistance. Moreover, the interfacial contact resistance (ICR) of Cr-nitride layer is significantly decreased up to 15 m Omega cm(-2) compared with pure stainless steel and the ICR is maintained after corrosion tests. This analysis indicates that the improvement is originating solely from dense Cr-nitride layer on the surface.
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